The plant floor, whether discrete, batch, hybrid or process, is changing rapidly. The increasing use of smartphones and tablets and small PCs on the plant floor has given rise to the BYOD (bring your own device) movement. This is a security headache, but the use of smartphones and tablets will continue to grow because the utility of having access to these devices right there in the field far outweighs the potential problems for security.
In the meantime, people are working out the details. Here's a press release detailing the award of a patent for an augmented reality app.